This article is about the year 900. For the skateboarding trick, see 900 (skateboarding). For series, see 900 series.
|Centuries:||8th century · 9th century · 10th century|
|Decades:||870s · 880s · 890s · 900s · 910s · 920s · 930s|
|Years:||897 · 898 · 899 · 900 · 901 · 902 · 903|
|900 by topic|
|State leaders – Sovereign states|
|Birth and death categories|
|Births – Deaths|
|Establishment and disestablishment categories|
|Establishments – Disestablishments|
|Ab urbe condita||1653|
|Chinese calendar||己未年 (Earth Goat)|
3596 or 3536
— to —
庚申年 (Metal Monkey)
3597 or 3537
|- Vikram Samvat||956–957|
|- Shaka Samvat||821–822|
|- Kali Yuga||4000–4001|
|Japanese calendar||Shōtai 3|
|Minguo calendar||1012 before ROC|
|Seleucid era||1211/1212 AG|
|Thai solar calendar||1442–1443|
|Wikimedia Commons has media related to 900.|
- The Postclassic period starts in Mesoamerica.
- The Maya city-state of Palenque was abandoned.
- The Maya city-state of Copan was abandoned.
- In Peru the Lambayeque people established themselves over areas previously developed by the Moche.
- By this time the Fatimids broke away from the Abbasids and migrated to North Africa. They were descendants of Mohammad’s daughter, Fatima.
- The east coast of Africa was impacted by trade and Arab, Persian and Indian traders mixed with the indigenous Bantu. Many of the coastal Bantu adopted Islam and the Arabic word Swahili, meaning "people of the shore," to describe themselves. By this time they had reached as far south as Sofala in Mozambique.
- April 21 – Namwaran and his children, Lady Angkatan and Bukah, are granted pardon by the Lakan of Tondo, as represented Jayadewa, Lord Minister of Pila, which released them of all their debts as inscribed in the Laguna Copperplate Inscription, Philippines.
- May 28 – victory of the Transoxianian amir Ismail Samani at Balkh over Amr Saffari, the latter is captured and sent to the Abassid caliph in Baghdad. The Samanid dynasty now rules over Khorasan as well as Transoxiana. A few months later, the Samanids also conquer the Zaydid emirate of Tabaristan. The Samanid victory marks also the beginning of the dispersion of the local Shi'ites by the new Sunni power.
- Earliest recorded reference to the Kingdom of Tondo (see above) on the island of Luzon in present-day Philippines.
- Gyeon Hwon formally establishes the kingdom of Hubaekje in southwestern Korea.
- In India, beginning of the rule of Maravarman Rajasimha II, king of Pandya.
- The Byzantine offensive against the Muslim troops starts anew in Cilicia, Mesopotamia and Armenia.
- The Qarmatians of Al-Bahrayn, under Abū-Saʿīd Jannābī, score a major victory over the Abbasid army led by Al-'Abbas ibn 'Amr al-Ghanawi.
- January – the count of Capua Atenulf I conquers the principality of Benevento.
- February 4 – the rule of Louis IV the Child upon Western Francia.
- June 8 – Edward the Elder is crowned king of England at Kingston upon Thames.
- June 17 – Baldwin II, Count of Flanders has Fulk the Venerable, bishop of Reims, assassinated.
- June 29 – the Venetians repel the Magyar raiders at Rialto.
- July – soon after the death of his wife Zoe Zaoutzaina, the Byzantine emperor Leo VI the Wise marries Eudokia Baïana.
- August – Abdallah, son of the Aghlabid emir Ibrahim II, represses a revolt of his Muslim subjects and then initiates a campaign against the last Byzantine strongholds in Sicily.
- August 13 – Zwentibold, king of Lotharingia is killed in battle on the Meuse river while fighting against his rebellious subjects; subsequently they recognize the emperor Louis IV as their rightful suzerain.
- October 12 – following Magyars raids in Lombardy, Louis the Blind, king of Provence, is called into the peninsula by the grandees, takes Pavia, forces Berengar of Friuli to flee, and replaces him as crowned king of Italy.
- Constantine II succeeds his cousin Donald II as king of Scotland; he will reign for more than 40 years.
- Docibilis I of Gaeta and his Saracen mercenaries attack Capua, in vain.
- After the rejection of their alliance proposal by the Bavarians, the Hungarians attack this country, occupy Pannonia and parts of Ostmark, which become part of the Hungarian state until today.
- The Persian scientist Rhazes distinguishes smallpox from measles in the course of his writings. Holding against any sort of orthodoxy, particularly Aristotle's physics, he maintains "the conception of an 'absolute' time, regarded by him as a never-ending flow".
- Abū Ja'far al-Khāzin, Persian astronomer and mathematician
- August 13 – Zwentibold, last King of Lotharingia (b. 870)
- October 3 – Muhammad ibn Zayd, Emir of Tabaristan
- Domnall II, King of the Picts
- Fulk the Venerable, Archbishop of Rheims (assassinated by Baldwin II, Count of Flanders)
- Par Ṭabarī (translated by Franz Rosenthal) (1985). The return of the Caliphate to Baghdad. SUNY Press. ISBN 978-0-87395-876-9.
- René Grousset (1885-1952) (1965) . L'empire des steppes, Attila, Gengis-Khan, Tamerlan (PDF) (4 ed.). Paris: Payot.
- N. Jayapalan (2001). History of India. Atlantic Publishers & Distri. ISBN 978-81-7156-928-1.
- Louis Bréhier (1946). Vie et mort de Byzance (PDF). Paris: Albin Michel. p. 596.
- Barbara M. Kreutz Before the Normans University of Pennsylvania Press, 1996 ISBN 978-0-8122-1587-8
- Jacques Flach Les Origines de l'ancienne France. Volume 4 Ayer Publishing ISBN 978-0-8337-1147-2
- N. J. Higham, David Hill Edward the Elder, 899-924 Routledge, 2001 ISBN 978-0-415-21497-1
- Heinrich Joseph Wetzer Dictionnaire encyclopédique de la théologie catholique Gaume frères et J. Duprey, 1864
- Enrico Guidoni La ville européenne: formation et signification du quatrième au onzième siècle Editions Mardaga, 1981 ISBN 978-2-87009-133-3
- Theodora Antonopoulou The Homilies of the Emperor Leo VI BRILL, 1997 ISBN 978-90-04-10814-1
- A. Charguéraud Les batards célèbres M. Lévy, 1859
- Charles Albert Cingria La reine Berthe L'Age d'Homme, 1992 ISBN 978-2-8251-0347-0
- Fiona Somerset Fry The history of Scotland Routledge, 1985 ISBN 978-0-415-06601-3
- Caravale, Mario (ed). Dizionario Biografico degli Italiani XL Di Fausto – Donadoni. Rome, 1991.
- Artaud de Montor Histoire des souverains pontifes romains Didot, 1846